

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

import org.apache.tomcat.util.codec.binary.Base64;

/**
 *
 * @author Administrator
 *
 */
public class AES {
	
	 private static String sKey = "TRB$A#Yt@v*Bu@W3";

    // 加密
    public static   String Encrypt(String sSrc) throws Exception {
        if (sKey == null) {
            System.out.print("Key为空null");
            return null;
        }
        // 判断Key是否为16位
        if (sKey.length() != 16) {
            System.out.print("Key长度不是16位");
            return null;
        }
        byte[] raw = sKey.getBytes("utf-8");
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));

        return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。
    }
    

    // 解密
    public static   String Decrypt(String sSrc) {
    	try {
            // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (sKey.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }
            if(sSrc.length()==1) {
            	 return "null";
            }
            byte[] raw = sKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            try {
            byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
                System.out.println(e.toString());
                return "null";
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
            return "null";
        }
//			return new String(decryptResult);
    }

        /**
           * 将16进制转换为二进制
         * @method parseHexStr2Byte
         * @param hexStr
         * @return
         * @throws 
         * @since v1.0
         */
//        public static byte[] parseHexStr2Byte(String hexStr){
//            if(hexStr.length() < 1)
//                return null;
//            byte[] result = new byte[hexStr.length()/2];
//            for (int i = 0;i< hexStr.length()/2; i++) {
//                int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
//                int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
//                result[i] = (byte) (high * 16 + low);
//            }
//            return result;
//        }
    public static void main(String[] args) throws Exception {
        /*
         * 此处使用AES-128-ECB加密模式，key需要为16位。
         */
        String cKey = "TRB$A#Yt@v*Bu@W3";
        // 需要加密的字串
        String cSrc = "188162412371752371461741111644989423112-23-34-45-56-78";
        System.out.println(cSrc);
        // 加密
        String enString = AES.Encrypt(cSrc);
        System.out.println("加密后的字串是：" + enString);
        System.out.println("加密后的字串1是：" + "68XHDQmMVDvhI1vyQgd5wTXmzqRbsEbSrb5MNchsoSu9K9LtWjb6hRyyKwEH2/ppIg05oA6dZjLP5mCOIEXC5A==");

        // 解密
        String decrypt = AES.Decrypt("NNIdNHLy6a0f0b2hXpMltWDCS+gOrJMw2RJEzHBWtOhJnd75WVYf5BBeM8R5PrskF2fj00dam/QKZaxikYb0Yg==");
        System.out.println("解密后的字串是：" + decrypt);
        String decrypt_mac = decrypt.substring(decrypt.length() - 17, decrypt.length());
        String decrypt_crc = decrypt.substring(0, decrypt.length() - 17);
        System.out.println("解密后的字串decrypt_mac是：" + decrypt_mac);
        System.out.println("解密后的字串decrypt_crc是：" + decrypt_crc);

    }
}

